Question
The ratio of two numbers 'a' and 'b' is 7:4,
respectively. Whereas the ratio of 'b' and 'c' is 5:8, respectively. When 15 is added to 'a', it becomes thrice of 'b'. Find the sum of 'a', 'b' and 'c'.Solution
ATQ, let the numbers 'a' and 'b' be '14k' and 8k respectively. So, 'c' = 8k X (8/5) = '12.8k' ATQ; (14k + 15) = 3 X (8k) Or, 14k + 15 = 24k Or, k = 1.5 So, required sum = 14k + 8k + 12.8k = 34.8 X 1.5 = 52.2
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